<html>
<head><meta charset="utf-8"><title>1.36 regressions · t-compiler · Zulip Chat Archive</title></head>
<h2>Stream: <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/index.html">t-compiler</a></h2>
<h3>Topic: <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/1.2E36.20regressions.html">1.36 regressions</a></h3>

<hr>

<base href="https://rust-lang.zulipchat.com">

<head><link href="https://rust-lang.github.io/zulip_archive/style.css" rel="stylesheet"></head>

<a name="168452214"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/1.36%20regressions/near/168452214" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Pietro Albini <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/1.2E36.20regressions.html#168452214">(Jun 18 2019 at 20:25)</a>:</h4>
<p><span class="user-mention" data-user-id="116009">@nikomatsakis</span> <span class="user-mention" data-user-id="116083">@pnkfelix</span> there are 14 open regression issues, 12 of them marked T-compiler</p>



<a name="168452230"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/1.36%20regressions/near/168452230" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Pietro Albini <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/1.2E36.20regressions.html#168452230">(Jun 18 2019 at 20:25)</a>:</h4>
<p>and the release is in a bit more than 2 weeks :/</p>



<a name="168452283"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/1.36%20regressions/near/168452283" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Pietro Albini <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/1.2E36.20regressions.html#168452283">(Jun 18 2019 at 20:26)</a>:</h4>
<p><a href="https://github.com/rust-lang/rust/issues?utf8=%E2%9C%93&amp;q=is%3Aopen+label%3Aregression-from-stable-to-beta+label%3AT-compiler" target="_blank" title="https://github.com/rust-lang/rust/issues?utf8=%E2%9C%93&amp;q=is%3Aopen+label%3Aregression-from-stable-to-beta+label%3AT-compiler">https://github.com/rust-lang/rust/issues?utf8=%E2%9C%93&amp;q=is%3Aopen+label%3Aregression-from-stable-to-beta+label%3AT-compiler</a></p>



<a name="168453043"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/1.36%20regressions/near/168453043" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/1.2E36.20regressions.html#168453043">(Jun 18 2019 at 20:36)</a>:</h4>
<p>I’ll try to go through these on my own tomorrow, in order to figure out which ones need to be subjects at the T-compiler meeting on Thursday</p>



<a name="168453104"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/1.36%20regressions/near/168453104" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/1.2E36.20regressions.html#168453104">(Jun 18 2019 at 20:36)</a>:</h4>
<p>(Luckily I am not at the All-Hands so I can actually commit to such a task)</p>



<a name="168457593"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/1.36%20regressions/near/168457593" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> centril <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/1.2E36.20regressions.html#168457593">(Jun 18 2019 at 21:34)</a>:</h4>
<p>I'm going to just close <a href="https://github.com/rust-lang/rust/pull/59858" target="_blank" title="https://github.com/rust-lang/rust/pull/59858">https://github.com/rust-lang/rust/pull/59858</a> outright because I don't see the language team accepting this back.</p>



<a name="168459265"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/1.36%20regressions/near/168459265" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> davidtwco <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/1.2E36.20regressions.html#168459265">(Jun 18 2019 at 22:00)</a>:</h4>
<p>Is that the correct link? It goes to a months old PR for me.</p>



<a name="168461411"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/1.36%20regressions/near/168461411" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> centril <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/1.2E36.20regressions.html#168461411">(Jun 18 2019 at 22:32)</a>:</h4>
<p><span class="user-mention" data-user-id="116107">@davidtwco</span>  oops; I meant <a href="https://github.com/rust-lang/rust/issues/61481" target="_blank" title="https://github.com/rust-lang/rust/issues/61481">https://github.com/rust-lang/rust/issues/61481</a></p>



<a name="168583605"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/1.36%20regressions/near/168583605" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/1.2E36.20regressions.html#168583605">(Jun 20 2019 at 10:24)</a>:</h4>
<p>I just realized I should probably be logging my actions on these issues somewhere</p>



<a name="168583606"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/1.36%20regressions/near/168583606" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/1.2E36.20regressions.html#168583606">(Jun 20 2019 at 10:24)</a>:</h4>
<p>so lets see</p>



<a name="168583659"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/1.36%20regressions/near/168583659" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/1.2E36.20regressions.html#168583659">(Jun 20 2019 at 10:25)</a>:</h4>
<p>"ICE while bootstrapping (./x.py build)" <a href="https://github.com/rust-lang/rust/issues/59945" target="_blank" title="https://github.com/rust-lang/rust/issues/59945">#59945</a> -- I closed this yesterday as "not enough information to reproduce nor act."</p>



<a name="168583776"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/1.36%20regressions/near/168583776" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/1.2E36.20regressions.html#168583776">(Jun 20 2019 at 10:27)</a>:</h4>
<p>"regression: overflow evaluating, Send/Sync?" <a href="https://github.com/rust-lang/rust/issues/61472" target="_blank" title="https://github.com/rust-lang/rust/issues/61472">#61472</a> -- I confirmed that fuzzy-pickles and conch-runtime were resolved on nightly at approx same time that PR <a href="https://github.com/rust-lang/rust/issues/61754" target="_blank" title="https://github.com/rust-lang/rust/issues/61754">#61754</a> landed. I have also nominated PR <a href="https://github.com/rust-lang/rust/issues/61754" target="_blank" title="https://github.com/rust-lang/rust/issues/61754">#61754</a> for a beta backport</p>



<a name="168584121"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/1.36%20regressions/near/168584121" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/1.2E36.20regressions.html#168584121">(Jun 20 2019 at 10:32)</a>:</h4>
<p>"regression: conflicting implementation for &amp;_" <a href="https://github.com/rust-lang/rust/issues/61473" target="_blank" title="https://github.com/rust-lang/rust/issues/61473">#61473</a> -- closed as "fixed by upstream crate patches", as in, <code>cargo update</code> should suffice. (Maybe crater should include this as something it automatically attempts?)</p>



<a name="168584529"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/1.36%20regressions/near/168584529" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/1.2E36.20regressions.html#168584529">(Jun 20 2019 at 10:40)</a>:</h4>
<p>"regression: conflicting implementations for From&lt;&amp;_&gt;" <a href="https://github.com/rust-lang/rust/issues/61474" target="_blank" title="https://github.com/rust-lang/rust/issues/61474">#61474</a> -- closed as "fixed by upstream crate update". But in this case, I don't think <code>cargo update</code> suffices for the fix, because the upstream update was not a patch release.</p>



<a name="168590207"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/1.36%20regressions/near/168590207" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/1.2E36.20regressions.html#168590207">(Jun 20 2019 at 12:23)</a>:</h4>
<p>"regression: trait no longer implemented" <a href="https://github.com/rust-lang/rust/issues/61563" target="_blank" title="https://github.com/rust-lang/rust/issues/61563">#61563</a> -- posted a lot a comments in the issue. Basically this was a subtle issue of a previously untested doc example that started being tested and thus exposed code that does not compile. Filed an issue with the originating crate and closed as not-a-bug.</p>



<a name="168593460"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/1.36%20regressions/near/168593460" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/1.2E36.20regressions.html#168593460">(Jun 20 2019 at 13:09)</a>:</h4>
<p>"regression: type annotations required cannot resolve <code>std::borrow::Cow&lt;'_, str&gt;: std::borrow::Borrow&lt;_&gt;</code>" <a href="https://github.com/rust-lang/rust/issues/61476" target="_blank" title="https://github.com/rust-lang/rust/issues/61476">#61476</a> -- closed as duplicate of <a href="https://github.com/rust-lang/rust/issues/60958" target="_blank" title="https://github.com/rust-lang/rust/issues/60958">#60958</a></p>



<a name="168687912"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/1.36%20regressions/near/168687912" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/1.2E36.20regressions.html#168687912">(Jun 21 2019 at 14:51)</a>:</h4>
<p>"Panic with <code>Layout mismatch when copying!</code> from macro" <a href="https://github.com/rust-lang/rust/issues/61663" target="_blank" title="https://github.com/rust-lang/rust/issues/61663">#61663</a> -- very very weird; see comments on issue. Bisected injection down to PR <a href="https://github.com/rust-lang/rust/issues/59560" target="_blank" title="https://github.com/rust-lang/rust/issues/59560">#59560</a>. assigned to <span class="user-mention" data-user-id="116118">@Matthew Jasper</span> and self. Removed nomination tag.</p>



<a name="168688150"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/1.36%20regressions/near/168688150" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> oli <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/1.2E36.20regressions.html#168688150">(Jun 21 2019 at 14:54)</a>:</h4>
<p>I'm reading it ever since you wrote which PR caused it (I reviewed it after all)</p>



<a name="168688211"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/1.36%20regressions/near/168688211" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> oli <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/1.2E36.20regressions.html#168688211">(Jun 21 2019 at 14:55)</a>:</h4>
<p>The only entry point I have so far is that enum discriminant computations are always confusing to me since everything is <code>isize</code> until actually used</p>



<hr><p>Last updated: Aug 07 2021 at 22:04 UTC</p>
</html>